#!/bin/sh

# When provided with a git repo, which has been used to produce a
# distribution tar.gz (with make dist) and the resultant tar-file,
# lists files which appear in one or the other only, to help check
# for missing EXTRA_DIST entries in Makefile.am files.

scriptname=tar-compare
if ! MYTMP=$(mktemp -d -t $scriptname-XXXXXX)
then
            echo >&2
            echo >&2
            echo >&2 "Cannot create temporary directory."
            echo >&2
            exit 1
fi

cleanup() {
  status=$?
  rm -rf "${MYTMP}"
  exit $status
}

# clean up if we get stopped by Crtl-C or forced logout or normal exit
trap cleanup INT
trap cleanup HUP
trap cleanup 0

if [ $# -ne 2 ]
then
  echo "tar-compare git-dir tar-gz-file"
  exit 1
fi

mkdir $MYTMP/unpack
tar xfzC "$2" $MYTMP/unpack
diff -r "$1" $MYTMP/unpack/* | grep "^Only" | sed \
	-e '/: autom4te\.cache$/d' \
	-e '/: \.deps$/d' \
	-e '/: \.git$/d' \
	-e '/: \.gitattributes$/d' \
	-e '/: \.github$/d' \
	-e '/: \.gitignore$/d' \
	-e '/: \.travis$/d' \
	-e '/: \.travis.yml$/d' \
	-e '/: config\.log$/d' \
	-e '/: config\.status$/d' \
	-e '/: config\.h.*$/d' \
	-e '/: Makefile$/d' \
	-e '/: hooks$/d' \
	-e '/: packaging$/d' \
	-e '/: stamp-h1$/d' \
	-e '/: README\.md$/d' \
	-e '/: tmp-anchor-links$/d' \
	-e '/: tmp-manproc$/d' \
	-e '/: .*\.tar\.\(gz\|bz2\|xz\)$/d' \
	> $MYTMP/out

cat $MYTMP/out
test -s $MYTMP/out && exit 1
exit 0
